The Americans, all ranked in the WTA top 30, will play host to Sweden at Delray Beach, Florida, on April 20-21, with the winner qualifying for the 2014 World Group and the loser relegated with no chance to win the trophy next year.

"I'm really excited about the team that we have," US Fed Cup captain Mary Joe Fernandez said. "We have great talent and depth, which is a perfect combination."

Venus Williams is ranked 22nd, six spots behind Australian Open semi-finalist Stephens and five ahead of Lepchenko.